The Catalina 36 Mk1 Sailboat

The Catalina 36 Mk1, a masthead cruising sloop, was designed by Frank Butler and built in the USA by Catalina Yachts.

A Catalina 36 MkI at anchorThe Catalina 36 Mk1

Published Specification for the Catalina 36 Mk1

Underwater Profile: Fin keel with spade rudder

Hull Material: GRP (Fibreglass)

Length Overall: 36'4" (11.1m)

Waterline Length: 30'3" (9.2m)

Beam: 11'11" (3.6m)

Draft: 5'10" (1.8m)

Rig Type: Masthead Sloop

Displacement: 13,500 lb (6,123 kg)

Designer: Frank Butler

Builder: Catalina Yachts (USA)


'Barefoot 2', a Catalina 36 for Sale

But she won't be on the secondhand boat market for long. In any event, the ad will remain available for anyone looking for great pics of the interior and more info about these very popular cruising boats.

Published Design Ratios for the Catalina 36 Mk1

1. Sail Area/Displacement Ratio: 15.4

  • Less than 16 would be considered under-powered;
  • 16 to 20 would indicate reasonably good performance;
  • Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio: 44.4

  • Under 40: less stiff, less powerful
  • Over40: stiffer, more powerful

3. Displacement/Length Ratio: 218

  • Under 100: Ultralight
  • 100 to 200: Light
  • 200 to 275: Moderate
  • 275 to 350: Heavy
  • Over 350: Ultraheavy

4. Comfort Ratio: 24.0

  • Under 20 indicates a lightweight racing boat
  • 20 to 30 indicates a coastal cruiser
  • 30 to 40 indicates a moderate offshore cruising boat
  • 40 to 50 indicates a heavy offshore boat
  • Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula: 2.0

  • Under 2.0 (the lower the better): Better suited for ocean passages
  • Over 2.0: Less suited for ocean passages

read more about these all-revealing numbers...


Summary Analysis of the Design Ratios for the Catalina 36 Mk1

1. A Sail Area/Displacement Ratio of just 15.4 suggests that the Catalina 36 Mk1 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.

2. A Ballast/Displacement Ratio of 44.4 means that the Catalina 36 Mk1 will stand up well to her canvas in a blow, helping her to power through the waves.

3. A Displacement/Length Ratio of 218, tells us the Catalina 36 Mk1 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.

4. Ted Brewer's Comfort Ratio of 24.0 suggests that crew comfort of a Catalina 36 Mk1 in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not encouraging news for anyone prone to seasickness. 

5. The Capsize Screening Formula of 2.0 tells us that a Catalina 36 Mk1 would not be a good choice of sailboat for ocean passage-making, owing to the increased risk of capsize in strong winds and heavy seas when compared to a sailboat with a CSF of less than 2.0.

Other sailboats in the Catalina range include:






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